Wang et al. (2025) Possible Causes of the Significant Advancement of the Tibetan Plateau Rainy Season under the Background of Climate Warming

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Journal of Climate
• Year: 2025
• Date: 2025-12-08
• Authors: Zunya Wang, Xingwen Jiang, Qingquan Li, Yafang Song
• DOI: 10.1175/jcli-d-25-0397.1

Research Groups

Not explicitly mentioned in the provided abstract.

Short Summary

The Tibetan Plateau rainy season (TPRS) has significantly advanced from 1961 to 2023, primarily driven by an intensified Lake Baikal ridge, weakened 500-hPa westerlies over East Asia, and enhanced activity of warm, moist air over the southern TP, all linked to regional climate warming and large-scale teleconnections.

Objective

• To investigate the significant advancing trend of the Tibetan Plateau rainy season (TPRS) from 1961 to 2023 and identify the underlying atmospheric circulation anomalies and broader climate mechanisms responsible for this shift.

Study Configuration

• Spatial Scale: Tibetan Plateau, Lake Baikal region, East Asia, Central Asia–South Siberia transition zone, West Asia.
• Temporal Scale: 1961 to 2023 (63 years).

Methodology and Data

• Models used: Not explicitly mentioned in the abstract.
• Data sources: Not explicitly mentioned, but implies analysis of atmospheric circulation, precipitation, and temperature data (likely observational or reanalysis).

Main Results

• The Tibetan Plateau rainy season (TPRS) has exhibited a significant advancing trend from 1961 to 2023.
• This advancement is primarily driven by the intensification of the ridge over Lake Baikal, which promotes the intrusion of dry and cold air, increasing dynamic instability.
• Concurrently, the weakening of the 500-hPa westerlies over East Asia reduces net water vapor outflow from the TP, enhancing local moisture availability.
• The warm and moist air mass near the southern edge of the TP has become more active, showing both strengthening and advancing trends.
• The combination of stronger cold air intrusion, enhanced warm/moist air activity, and increased moist supply collectively favors earlier precipitation and TPRS advancement.
• The TPRS advance is modulated by an intensified Eurasian teleconnection wave train and pronounced surface warming over the central Asia–south Siberia transition zone and from West Asia to western East Asia.
• The teleconnection and surface warming over Central Asia–South Siberia strengthen the Lake Baikal ridge and weaken mid-tropospheric westerlies, while surface warming from West Asia to western East Asia intensifies warm/moist air activity south of the TP.
• The Eurasian teleconnection wave train and surface warming over the central Asia–south Siberia transition zone are closely linked and likely interact in a mutually reinforcing manner.
• Overall, the advancement of the TPRS onset is closely associated with regional climate warming.

Contributions

• Identifies specific atmospheric circulation anomalies (intensified Lake Baikal ridge, weakened East Asian westerlies, enhanced southern TP warm/moist air) as key drivers for the observed TPRS advancement.
• Establishes a link between these regional circulation changes and larger-scale climate phenomena, including the Eurasian teleconnection wave train and regional surface warming.
• Provides a comprehensive understanding of the complex interplay of dynamic and thermodynamic factors contributing to the TPRS shift.
• Advances the understanding of climate change impacts and mechanisms over the Tibetan Plateau.

Funding

Not explicitly mentioned in the provided abstract.

Citation

@article{Wang2025Possible,
  author = {Wang, Zunya and Jiang, Xingwen and Li, Qingquan and Song, Yafang},
  title = {Possible Causes of the Significant Advancement of the Tibetan Plateau Rainy Season under the Background of Climate Warming},
  journal = {Journal of Climate},
  year = {2025},
  doi = {10.1175/jcli-d-25-0397.1},
  url = {https://doi.org/10.1175/jcli-d-25-0397.1}
}